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    <title>Document</title>
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    <script>
        // 1,1,2,3,5,8,13,21 34 55    
        // n = (n-1)+(n-2)

        // function fn(n){
        //     if(n==1|| n==2){
        //         return 1;
        //     }else{
        //         return fn(n-1)+fn(n-2)
        //     }
        // }
        // console.log(fn(10));

        function jc(n){
            if(n==1){
                return 1
            }else{
                return n*jc(n-1)
            }
        }

        console.log(jc(5));


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